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<div class="title">/home/ronaldo/workspace/DiscontinuousGalerkin/MatrixOperation.f90</div>  </div>
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<a href="_matrix_operation_8f90.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a><a class="code" href="class_matrix_operation.html">00001</a> <span class="keyword">module</span> <a class="code" href="class_matrix_operation.html">MatrixOperation</a>
<a name="l00002"></a>00002 
<a name="l00003"></a>00003 <span class="keyword">contains</span>
<a name="l00004"></a>00004 
<a name="l00005"></a><a class="code" href="class_matrix_operation.html#ab79b1c7045302eb8264f83e022155959">00005</a>     <span class="keywordtype">pure</span> <span class="keyword">function </span>Determinant2(A) result (v)
<a name="l00006"></a>00006         <span class="keyword">implicit none</span>
<a name="l00007"></a>00007         <span class="keywordtype">real(kind=8)</span>, <span class="keywordtype">dimension(2,2)</span>, <span class="keywordtype">intent(in)</span> :: A
<a name="l00008"></a>00008 
<a name="l00009"></a>00009         <span class="keywordtype">real(kind=8)</span> :: v
<a name="l00010"></a>00010 
<a name="l00011"></a>00011         v = A(1,1) * A(2,2) - A(1,2) * A(2,1)
<a name="l00012"></a>00012 <span class="keyword">    end function</span>
<a name="l00013"></a>00013 
<a name="l00014"></a><a class="code" href="class_matrix_operation.html#a6f3089574fe21e831c7cbf744052fa32">00014</a>     <span class="keywordtype">pure</span> <span class="keyword">subroutine </span>Invert2(A)
<a name="l00015"></a>00015         <span class="keyword">implicit none</span>
<a name="l00016"></a>00016         <span class="keywordtype">real(kind=8)</span>, <span class="keywordtype">dimension(2,2)</span>, <span class="keywordtype">intent(inout)</span> :: A
<a name="l00017"></a>00017 
<a name="l00018"></a>00018         <span class="keywordtype">real(kind=8)</span> :: det, swap
<a name="l00019"></a>00019 
<a name="l00020"></a>00020         det = Determinant2(A)
<a name="l00021"></a>00021 
<a name="l00022"></a>00022         swap = A(1,1)
<a name="l00023"></a>00023         A(1,1) = -A(2,2)
<a name="l00024"></a>00024         A(2,2) = -swap
<a name="l00025"></a>00025 
<a name="l00026"></a>00026         A = A / (-det)
<a name="l00027"></a>00027 <span class="keyword">    end subroutine</span>
<a name="l00028"></a>00028 <span class="keyword">end module</span>
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